also said that they had detected his presence in that boat in the backyard with one of their high tech technology devices that can see inside and register that he was there. brian ross, anything else that stood out to you? >> reporter: they talked about an exchange of gun fire, diane. they did shoot back at some point. and may have hit him when they did, i was told. so, that wasn't quite that they held off entirely. but it was exactly as martha and pierre described to us as we came forward with a special looking radar that sees thermal images and certainly the u.s. attorney said that they have made a public security exception and not give him his miranda warning. they will question him about what larger terror cell he might or might not be part of. >> again, it was dave hennebury who went back to look at his beloved boat and saw, instead, the man suspected of being a terrorist, a bomber. and we're told he's in his 60s, he's a retired telecommunications worker. and it was his phone call that really directed the police. we are getting so many reports out of boston on facebook from people saying, th